Interchangeable barrel for guns



May27, 1930. E. A. WILLIAMS INTERCHANGEABLE BARREL FOR GUNS 2Shezeizs-Sheei'l l Filed Nov. l, 1928 :riff/IM. .1.11. 'if/Ilm;

:Jn/vento?, E, Williams,

May 27, 1930. E. A. WILLIAMS 1,760,731

INTERCHANGEABLE BARREL Fon GUNS Filed Nov. l, 1928 2 Sheets-Sheet 2gigli/ 1 klm Patented May 27, 1930 UNITED STATES EDGAR A. WILLIAMS, EUPPER BLACK EDDY, PENNSYLVANIA INTERCHANGEALE BARR-EL FOR GUNSApplication filed November 1, 1928. 'Serial No. 316,481.

The invention relates t0 firearms of the shot gun type and has for itsprincipal object the provision of means whereby barrels of smallercaliber than the barrel provided for the 'lirearm originally may beinstalled on the stock and use the same caliber of cartridges thecartridges being modified to provide for ammunition therein suitable tothe caliber of the barrel.

A further obj ect of the invention is the provision of interchangeablebarrels for shot guns of smaller caliber than the barreloriginallyprovid'ed for the gun, the smaller calibered barrels having achamber for the cartridge corresponding lin caliber to the chamber atthe breech'ot the original barrel, a

shoulder being provided at the breech end of the bore of the smallercalibered barrel with a circumferential groove vto receive the crimpededge of the cartridge, said shoulder engaging a ring-like wad in thecartridge with an opening corresponding to the gauge of the barrel, saidshoulder holding the ring- H like wad in position in the cartridge when2 fired. Y

A further object of the invention kis the provision of means by whichthe magazines of firearms are interchangeable.

The invention will be described in detail 'hereinafter and will be foundillustrated in the accompanying drawings, inwhich Figure 1 is a sideview partly broken awayl and in section showing a shot gun ofthe type inwhich the interchangeable barrels are adapted to be mounted,

Figure 2 is a longitudinal `sectional view of a shot gun barrel of asmaller gauge than the gauge of the barrel shownin Figure 1 and adaptedto be used interchangeably therewith, the figure being on an enlargedscale,

Figure 3 is a view similar to Figure 1 showing a rie barrel in positionon the stock of the gun shown in Figure 1,

Figure 4 is 'an enlarged sectional view vtaken longitudinally of thebarrel of Figure 3,

Figure 5 is a longitudinal sectional view of the cartridge adapted to beused in connection with the barrel of Figure 2,

Figure 6 is a transverse sectional view on a plane indicated by the line6--6 of F ig? ure 5,

Figures? and 8 are transverse sectional views taken on the planesindicated by the lines 7-7 and 8 8, respectively, of Figure 4, and l yFigure 9 is a sectional detail of the iniproved means for holding themagazine plug in position on the barrel shown in Figures 1, 2, 3 andFigure 4.

In the drawings similar reference characters are used to designatecorresponding parts throughout the several views.

In Figure 1 is shown a shot gun of the Remington repeating type, model10-A, that has a stock A, barrel B, and a magazine C having its forwardend secured to a barrel lug D, E indicating the lever for securing themagazine on the barrel Alug D in the usual manner. The breech end of thebarrel B is provided with a chamber b to receive a cartridge F. f

In Figure 2 is showna sub-caliber barrel that is adapted to replace thebarrel B in Figure 1, said barrel being designated 1 and 7 having aVchamber 2 to receive a cartridge k that is of the same caliber as thecartridge F in VFigure 1, said cartridge being shown in detail inFigures 5 and 6, and includes a shell 4, 5 designating the reducingsleeve of the shell to reduce the bore of the shell for the ammunitionto the bore ofA-the barrel 1, and 6 indicates a wad held in position inthe end of the shell by crimping the edges of the shell as shown at 7 toengage the edges of the wad. Said wadI 6 is provided with a circularweakened portion 8 forming an annular outer portion 9 that is engaged bythe crimped edge '7v and engages the outer Vend'of the sleeve 5 to holdit in position. The barrel 1 is provided with a' shoulderl 10 at thebreech end of the boreJ 11 that also engages the annular portion 9 ofthe wad 6 and said shoulder 10 is provided with an annular groove orrecess 12 'to receive the crimped edge 7 of the cartridge 3. It will beunderstood that when the barrel 1 is ittecl in the stock A thecartridges used therefor are of the type shown in Figures 5 'and 6 andas the sleeve 5 reduces the caliber of the cartridge to correspond tothe caliber of the barrel and when the cartridge is placed in thechamber 2 the shoulder 10 by engaging the annular' portion 9 of the wadwill hold said annular portion 9, the central portion of the wad beingdriven out of the cartridge by the explosion thereof in the usual mannerand that the groove 12 by receiving the crimped end 7 of the shellpermits the shoulder 10 to engage said annular portion 9.

ln Figures 3 and 4 is shown a rifie barrel replacement for the firearm.shown in Figure 1, the rifle barrel being designated 21 and having itsbore 22 provided with spiral ribs 23 that are angular in'cross sectionas clearly shown in Figures 7 and 8. In the breech end of the barrel. 21is provided a chamber 24 for a cartridge 25 having a shell 26corresponding to the shell 4 of cartridge 3 and an annular wad 27 thatholds the sleeve 28 in the cartridge, said wad 27 being engaged by acrimped edge 29 0f the shell, 30 designating the projectile within thesleeve 28, and 31 a powder chamber at the rear of the projectile 8O thatis enlarged as shown, the bore of the sleeve 28 being provided with aninclined shoulder 32 at the forward end of the powder chamber 31 todirect the force of the explosion of the powder against the projectile80. The breech end of the bore of the barrel 21 is provided with ashoulder 33 that engages the wad 27, and is formed with an annularrecess or groove 34 to receive the crimped end 29 of the shell 24. Theinvention further ccntemplates the provision of an improved means forsecuring the forward end of the magazine to the barrel of the firearmand comprising the device shown in Figure 9 in detail in which isprovided a lug 41 having a yoke member 42 adapted to engage around thebarrel l, as shown in the drawings, or around the barrel 21, said lugbeing provided with an opening 43 to permit access to a screw 45engaging the barrel l and with the stop 45a limiting the movement of thelug 41 toward the muzzle of the barrel. Lug 4l is also provided with athreaded opening 411 to receive a threaded extension 44a on the magazineplug 44 that engages in the magazine C' and is provided with a recess44') to receive the conventional locking lever E. rilhe end of thereduced portion 44a provided with a transverse slot 46, and the lug 41provided with a slot 47 that is in alinement with the slot 46 when theplug 44 is in place that is designed to receive a latch member 48 thatis pivotally secured therein as shown at 49 and having a head 50 thatengages in the slot 4G and is held in engagement therewith by means of acoil spring 51. By this structure the plug 44 may be removed from thelug 41 by releasing the latch 48, which ordinarily conforms to the outersurface of the lug, by inserting a small coin, suoli as a dime againstthe upper end thereof, and the plug 44 may be secured in another lug 41of the same construction secured to another barrel forinterchangeability of the magazine. 52 indicates a screw plug that ismounted in the outer threaded end of the opening 41"L and is replacedwhen the threaded bore 41J formed so that the end of said plug 52 isthreaded to conform to the threads of the reduced extension 4421 thusforming a bearing for said extension 44a, and the plug 52 is notremovable while the plug 44 is in position in the lug 41. If desired theplug 52 may be substituted by a sling strap attachment having a plugconforming to the threaded plug 52 (not shown).

It will be understood that the invention applies to shot guns of l2, 16and 2O gauge, and in fact to any gauge shot gun, the invention not beinglimited to any particular gauge of gun barrel for which the piece may bemanufactured.

l/Vhat is claimed is 1. In a firearm of shot gun type, interchangeablebarrels of varying calibers, said barrels having chambers of uniformdialneters to receive cartridges of uniform caliber, the barrel ofsmaller caliber being provided with an annular recess surrounding thebreech end of its bore to receive the crimped end of a cartridge.

2. In a firearm of shot gun type, inter changeable barrels of varyingcalibers, said barrels having chambers of uniform diameters to receivecartridges of uniform calibers, a shoulder provided in a barrel ofsmaller caliber surrounding the breech end of the bore adapted to engagea wad in the cartridge, and said shoulder having an annular recess toreceive the crimped end of the cartridge.

3. In a firearm of shot gun type, interchangeable barrels of varyingcalibers, said barrels having chambers of uniform diameters to receivecartridges of uniform calibers, a barrel of smaller caliber having ashoulder surrounding the breech end of the bore adapted to engage anannular wad in a cartridge in the chamber and hold it in the cartridge,and the shoulder having an annular recess to receive the crimped end ofthe cartridge.

4. In a firearm of shot gun type7 interchangeable barrels of varyingcalibers, said barrels having chambers of uniform diameters to receivecartridges of uniform calibers, a barrel of smaller caliber having ashoulder surrounding vthe breech end of the bore, a wad for a cartridgehaving a weakened line to aline with the wall of the bore and providingan annular portion engaging said shoulder for retention within thecartridge shell, and the shoulder having an annular groove therein toreceive the crimped end of the cartridge.

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5. A rearm barrel having a bore of one gauge and a chamber at the breechof said barrel for a shell of larger gauge than the gauge of the bore,and a. shoulder in the barrel surrounding the breech end of the boreadapted to engage a Wad in a shell.

6. A firearm barrel having e bore of one gauge and a chamber at thebreech of said barrel for :L shell oi' larger gauge than the gauge ofthe bore, and a shoulder in the barrel surrounding the breech end of thebore adapted to engage a Wad in a shell and having an annular groovetherein of the same outside diameter as the diameter of the chamber andadapted to receive the end of the shell projecting beyond the Wad.

In testimony whereof I ax my signature.

EDGAR A WILLIAMS.

